Power mechanism



I. SYVERSTAD POWER MECHANISM Oct; 6, 1931.

2 Sheets-Sheet 1 Filed May 3l 930 w w m NEW? 5 WW l. SYVERSTAD POWER MECHANISM Oct. 6, 1931; v

Filed May 31, 1930 2 Sheets-Sheet 2 INVENTOR. I. SYVER ST FID A TTORNEYS.

l f .2 sectional View,

F gure 3 lsan endelevation of my device Patented 0a. e, 193 1.

ivnn sYvnRsrAn, or SAN FRANCISCO, CALIFORNIA FFICE,

rowan ivinciralvrstr Application filedMa'y 31,

This invention relates to improvements in power mechanism and has particular refer- :ence to propulsion means for ships.

A'further object is to produce a device 5, wherein standard mechanicalpractises are employed. 1 7

;A further object is "to produce a device which is economical to install.

Other objects and advantages will be ap- 119. parent-during the course ofthe following descrlptlon.

In the accompanying drawings forming a part of this specification'and in whichilike l numerals are employed to designate like parts 16, throughout the same,

"Figure 1 is a side elevation of my device as the same would appear when secured to-the vessel, T I

Figure2 is a e asit would appearifit were removed from.

I the vessel, and

" Figure 4 is a diagrammatic view illustrating. the principle involved: i I In ship propulsion the propeller of the ship is acting against a fluid, which fluid being unconfined, tends to dissipate in all directions, and therefore, a large percentage of power delivered bythe engines to the propeller is lost. -V

Applicant has therefore devised a means for retaining this power and again returning the same to'the propeller shaft.

' In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention,the numeral 5 designates a ship having the customary propeller shaft 6-upon which the pro- 'peller 7 is keyed. The end of this shaft 6 is teeth 9 formed adjacent the end thereof. A "casing 11 partly surrounds the path of rotation of thepropeller blades and also surrounds the blades-12 of an impeller 13. This impeller wheel is free to rotate upon the re- ,duced portion 8 of the shaft 6.. The casing 11 carries spokes 14 which support a ring 16 in which a bearing 17is mounted. This bearing 17 serves to support shafts 18 and 19. 7 These reduced in cross-section as shown at 8 and has 193QJiSeria1 at: 458,650.

shafts 18 and 19 carry -upon one end large gears as shown at 21 which mesh with the gear teeth 9 and upon'their opposite ends they carry gears 22 which mesh with teeth 23 formed upon a reduced portion of the hub of the" impeller blades 12. The gear ratio of the gear formed by the teeth; 23 to the ratio of the gears 22, is preferably two to one, while the gear ratio between the gears 21 and the gear formed onthe end of the shaft 6 is also two to'one. As aconsequence, the blades 12 mayrotate at a speed one-fourth of that of the-shaft6. The result of this construction isthat when thedevice issecured to a vessel as indicated inFigure 1 and the propeller of-the vessel isstarted, the water being acted upon by the p 7 propeller willfirst move rearwardly as indifragmentary detailed cross- 7 it engages the propeller, diagrammatically cated by the arrow A of Figure 4. As soon as illustrated at B, the direction of movement of the water will be changed into a spiral movement, as indicated by the spiral continuous arrow C. In this continuous whirling path of water, is placed the impeller D, and it will here be noted that the impeller 'D is connected back thru suitable gearing designated as .a whole by the letter E, to the shaft F. Therefore, applicant has devised a mechanism wherein the whirling action of the water just aft of the propeller, will deliver a portion of its power to an impeller, which impeller will in turn re-transmit this power back to the propeller thru a suitable gearing arrangement. This will of course as sist the engines of the vessel and will reduce the amount of power needed, and the consequent saving in fuel and other incidents to operate the vessel.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangement of par-ts may be resorted to without departing fZ aQ-jf v a 1,826,53

lf'ln a propulsion mechanism; athe co mbination with a propeller, of an impeller haV- ing its blades aligned with theZaxis of r0tation oi the propeller, saidimpeller being po- 1 V sitioned to the rear of the propeller and in o axialv alignment therewith." and reduction earing interposed between said propeller andsaid i nipeller. 7

In the combination of a driven screw propeller, an impeller positioned in the rear thereof' and adjacent thereto andin axim alignment therewith,- said impeller having V I fblad'es s'oarra nged as to form a minimum oi resistance to .forwardlor rearwardmovement. of a vessel havingfthe' deviceattaohed theretd. r '2 ;3.;;In thei combination of a driven screw propeller; an impeller positioned to the n rear of said- SCreW'prOpellerand in axial alignoinent jthereWit-h, the blades ofsaidimpeller v being-Yin; a plane parallel to the axis of rota-- v tion to said propeller whereby rotary =curyrentseaused-bysaid'propeller will be'trans- 25 formed into energy, and-gearing interposed qbet-ween saidfpropell'er and said impeller.

7-4; The -c0n1bi-nation::0f a' screw propeller,

1/ ,a'n-jinipelleiga casing surrounding said pror fpeller'and impeller-5a reduction gearing inter; "posedibet'vvfeen said propeller and impeller, said. gearing causing" said gimpellerand said propeller to rotate the same directions and different speeds with: respecttoeaeh other.-

- Intestiirionyvvhre'of I affix fmy signature.

a -;IYERI -SYVERSTAD-.- r a Y 

